The RFX8422 is a fully integrated, single-chip, single-die RFeIC (RF
Front-end Integrated Circuit) which incorporates all the RF functionality
needed for dual-mode WLAN, Bluetooth operations including
simultaneous WLAN and Bluetooth receive capability.
The RFX8422 architecture integrates a high-efficiency high-linearity PA,
a directional Coupler and output Power Detector, impedance matching
networks, harmonic filters, a LNA with Bypass and an SP3T Antenna
Switch all in a single CMOS device.

This RFeIC is designed to be used in combined 802.11b/g/n and
Bluetooth applications operating in the 2.4GHz band, and can be
powered directly from the battery.